Commit 0b818e39 authored by Oliver Neukum's avatar Oliver Neukum Committed by Greg Kroah-Hartman
Browse files

USB: usb_driver_claim_interface: add sanity checking



Attacks that trick drivers into passing a NULL pointer
to usb_driver_claim_interface() using forged descriptors are
known. This thwarts them by sanity checking.
Signed-off-by: default avatarOliver Neukum <ONeukum@suse.com>
CC: stable@vger.kernel.org
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7222c832
......@@ -502,11 +502,15 @@ static int usb_unbind_interface(struct device *dev)
int usb_driver_claim_interface(struct usb_driver *driver,
struct usb_interface *iface, void *priv)
{
struct device *dev = &iface->dev;
struct device *dev;
struct usb_device *udev;
int retval = 0;
int lpm_disable_error;
if (!iface)
return -ENODEV;
dev = &iface->dev;
if (dev->driver)
return -EBUSY;
......
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